However, when assessing the impact of SPT6 expression on the survival of GBM patients using additional data sets (Gravendeel, TCGA GBM array and TCGA GBM RNAseq, Supplementary Fig. 7g), we found no association between SPT6 expression and GBM patient survival, implying that the prognostic value of SPT6 is not independent of other variables such as WHO grade. The gene discussed is SUPT6H; the disease is glioblastoma.